why does make gain margin and phase margin on same plot.?

0 Answers  

---

What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

0 Answers  

---

Explain The Application Of Storage Batteries?

0 Answers   ABB,

---

some practicle study shows that the reactive power at the receiving end is not equal to the reactive power at the sending end.But according to theory the reactive power is exchanged by different parts of the network – capacitors and reactors permanently, but is never consumed or produced. Then Where that reacrtive power loss occuring?is there any formula to calculate reactive power loss?

3 Answers  

---

IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND LAYING THE CABLES

2 Answers   Cable Wireless,

---

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

---

What are the commonly used schemes for the bus zone protection?

0 Answers  

---

line and phase voltage relationship?

2 Answers   CPCL, IVRCL,

---

what is the similarity and difference between ups and inverter?

4 Answers   GMR,

---

what is T P N bus bar

1 Answers  

---

What are the main advantages of generalized error co-efficients?

0 Answers  

---

how much earthings are mendatory at a 25kva sub station?

3 Answers   Bhel,

---